<template>
  <!-- 由于index.scss中设置有对应公共样式，并已导入在main.js中，直接使用相应类名即可 -->
  <div class="container">
    <div class="app-container">
      <!-- 展示树形结构 -->
      <el-tree :expand-on-click-node="false" default-expand-all :data="depts" :props="defaultProps">
        <!-- 节点结构 -->
        <!-- v-slot="{ node, data }" 只能作用在template -->
        <template v-slot="{ data }">
          <!-- el-row行 el-col列 -->
          <el-row style="width:100%;height:40px" type="flex" justify="space-between" align="middle">
            <el-col>{{ data.name }}</el-col>
            <el-col :span="4">
              <span class="tree-manager">{{ data.managerName }}</span>
              <!-- $event 实参 表示类型 即在这里直接写operateDept与operateDept($event)是等效的 -->
              <el-dropdown @command="operateDept($event, data.id)">
                <span class="el-dropdown-link">
                  操作<i class="el-icon-arrow-down el-icon--right" />
                </span>
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item command="add">添加子部门</el-dropdown-item>
                  <el-dropdown-item command="edit">编辑部门</el-dropdown-item>
                  <el-dropdown-item command="del">删除</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
            </el-col>
          </el-row>
        </template>
      </el-tree>
    </div>
    <!-- .sync 表示会接受子组件emit的update:showDialog事件 值=>属性 -->
    <!-- ref 可以获取dom实例对象 ref也可以获取自定义组件的实例对象 -->
    <!-- 通过ref获取的其实就是对应this -->
    <AddDeptDialog ref="addDept" :show-dialog.sync="showDialog" :current-node-id="currentNodeId" @updateDepartment="getDepartment" />
  </div>
</template>
<script>
import { getDepartment, delDepartment } from '@/api/department'
import { transListToTreeData } from '@/utils'
import AddDeptDialog from './components/add-dept.vue'
export default {
  name: 'Department',
  components: { AddDeptDialog },
  data() {
    return {
      currentNodeId: null, // 存储当前点击的对应id
      showDialog: false,
      depts: [], // 数据属性
      defaultProps: {
        label: 'name', // 要显示的字段名
        children: 'children' // 读取子节点字段名
      }
    }
  },
  created() {
    this.getDepartment()
  },
  methods: {
    // 方法是通过this调用的,与api对应名字相同不会有影响2
    async getDepartment() {
      const res = await getDepartment()
      this.depts = transListToTreeData(res, 0)
    },
    operateDept(type, id) {
      if (type === 'add') {
        this.showDialog = true
        this.currentNodeId = id
      } else if (type === 'edit') {
        this.currentNodeId = id
        // 父组件调用子组件的方法来获取数据
        // bug:this.currentNodeId = id对应更新props--异步 之后直接调用子组件中的方法--同步
        // 解决方法：this.$nextTick 等数据更新完毕后才执行
        this.$nextTick(() => {
          this.$refs.addDept.getDepartmentDetail()
          // this.$refs.addDept等同于子组件的this
          this.showDialog = true
        })
      } else {
        this.$confirm('您确定删除该部门吗?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(async() => {
          await delDepartment(id)
          this.$message.success('删除部门成功!')
          this.getDepartment()
        })
      }
    }
  }
}
</script>
<style scoped>
.app-container {
  padding: 30px 140px;
  font-size: 14px;
}
.tree-manager {
  width: 50px;
  display: inline-block;
  margin: 10px;
}
.el-dropdown-link {
  margin-left: 20px
}
</style>
